`9.2 xx 8.8 = 72.96`

9.8 xx 10.2 =__

What will come in place of question mark (?) in the following questions ? 8.8 xx 3.2 xx 4.5 - 7.2 xx 3.2 = ?

(9.8 xx 2.3 + 4.46) div 3 = (3)^(?)

If 1xx 8+1=9 ,12 xx 8+2 =98 , 123xx 8+3=987 then 1234 xx 8+4= ............?

Simplify 117 + 9 xx 5 - 3 xx 8 + 55 xx 55 + 8 xx 7 + 6

Simplify : 8.349 - 2.57 + 6.28 - 9.6