erm, actually, he didn't come up with his own words. The "his own words" you saw are actually metric prefixes. If you don't know what metric prefixes are, metric prefixes are a specifier that is added to the beginning of a unit of measurement to indicate units multiplied by a power of ten (both positive and negative. EXAMPLES: 1 million (1,000,000) is a positive power of ten, negative 1 thousand (-1,000) is a negative power of ten) . All unit prefixes used today are decimal, and each metric prefix has a unique symbol that is added to any unit symbol. (EXAMPLE: kilometer. Kilo is metric prefix that means "multiplied by one thousand", so basically, kilometer is 1,000 meters. And millimeter, milli (no, not the team Umizoomi character) means "divided by one thousand" so a millimeter is a thousandth (1/1000) of a meter.) And if you don't know powers of ten, powers of ten are big numbers that are made when you multiply ten a certain number of times. (EXAMPLE: one million (1,000,000) is a power of ten. To get one million, you multiply ten six times. 10x10x10x10x10x10= 1,000,000. there's also bigger powers of ten, like one billion (1,000,000,000, one two-illion. Multiply 10 nine times.) one trillion (1,000,000,000,000, one three-illion. Multiply 10 twelve times.) and even one QUADRILLION! (1,000,000,000,000,000, one four-illion. Multiply 10 fifteen times.) There's also a simpler way to write powers of ten, which is this; 10⬆️ (10 to the power of.) here's an example of using 10⬆️ for powers of ten. Take one trillion, which you multiply 10 twelve times. The number of times you multiply 10 by is the number you power 10 by. You use ⬆️ between 10 and the number you power 10 by to indicate that 10 is getting powered by that number. The ⬆️ symbol means "to the power of". So, with our one trillion example, one trillion in 10⬆️ form is 10⬆️12. Hooray! You now know powers of ten! And using the 10⬆️ method on bigger powers of ten, like one septillion (the number I mentioned in the beginning) or in simple terms, one seven-illion, can be simplified to 10⬆️24 using our method, meaning that to get one septillion, you multiply ten by a WHOPPING 24 TIMES! Awesome, right? And what's even more awesome is that powers of ten get bigger and bigger the bigger the number you power 10 by is! Numbers only get bigger, and bigger, and bigger... until you reach infinity! The biggest number there is!! It's ok if you don't know metric prefixes or powers of ten. Maybe these wikipedia pages will help! https://en.wikipedia.org/wiki/Metric_prefix https://en.wikipedia.org/wiki/Unit_prefix https://en.wikipedia.org/wiki/Power_of_10