Volume=legntht imes widht time height
volume=11 and 3/5 times 9 times 12 and 1/2
volue=11 and 6/10 times 9 times 12 and 5/10
volume=11.6 times 9 times 12.5
volume=1305 m^3
100/5 = 20.
But, I'm not really sure how you want to do this.
You could multiply again by 2 or long multiply by 2
X is 7 and y is 2 I am pretty sure
