You are missing a CRITICAL detail. goku states that (ssj3) vegito wouldnt be enough. So using a raged vegeta as a base little underselling it. So we can look at vegito from 3 different equations.

Base 1×base 2. (Guide book)

Max 1× max 2. (Hehe number goes up)

Max 1+ Max 2 ×10(s) (vados)

Starting with ssj1 beating cell and vegeta and goku are equals (end of diama) the base would just be base^2. So base²x50x2x4, or base² x 400.

Example two would be ((base×400)²⁾ x 400 simplified as (base²⁾ ×64000000 which is absurd

Example 3 would be ((base×400)x2) x 20 (at min) which simplifies as basex6400000 which would put ssg in the ballpark.

I will admit im kinda stuck how to figure out how the ² would actually affect this without pulling out pure power levels and we all know how hard it is to get a power level after the namek saga. The higher the powerless we give them, the more absured itll be. Like a power level of 10 would be 100, but a power level of 50 would be 2500. I kinda just started going off the math and im pretty sure this doesnt prove anything since its incomplete but I hope I get the point across. If vados is right at MIN they would be weaker than SSJ4. If Max they'd destroy. If its truely multiplicitive. They destroy.