400 x 80 = 4 x 100 x 8 x 10 = 4 x 8 x 1000 = 32000
400 multiplied by 8 is 3,200
80 multiplied by 15 is 1200.
88,400,000,000
400%
It is 100*(400/80) = 500%
40
I suggest 80 * 410 = 80 * 400 + 80 * 10 = 32000 + 800 = 32800.
400 multiplied by 8 is 3,200
400 multiplied by 20 is 8,000
80
80 multiplied by 15 is 1200.
80 = 400/5
20000 + 6000 + 400 + 80 + 920000 + 6000 + 400 + 80 + 920000 + 6000 + 400 + 80 + 920000 + 6000 + 400 + 80 + 9
88,400,000,000
400%
It is 100*(400/80) = 500%
79 multiplied by 400 is 31,600.