Question 1022200
 One number is bigger than another by 406.
 If the bigger number is divided by the smaller one, you’ll get the quotient 3 and remainder 66.
 Find the numbers.
:
a & b are the numbers 
" One number is bigger than another by 406."
b = a - 406
" If the bigger number is divided by the smaller one, you’ll get the quotient 3 and remainder 66."
{{{((a-66))/b}}} = 3
3b = a - 66
replace b with (a-406)
3(a-406) = a - 66
3a - 1218 = a - 66
3a - a = 1218 - 66
2a = 1152
a = 1152/2
a = 576 is one number, 
then
b = 576 - 406
b = 170
:
You can check this for yourself using long division; 170|576