No problem, we've got 80400088 and 16373774 to multiply
80400088 × 16373774 = 16373774 × (80400088)
+ 16373774 × 8 yielding 130990192
+ 16373774 × 80 what gives us 1309901920
+ 16373774 × 000 that equals 0
+ 16373774 × 0000 that is equal 0
+ 16373774 × 00000 that equals 0
+ 16373774 × 400000 resulting in 6549509600000
+ 16373774 × 0000000 that results in 0
+ 16373774 × 80000000 that results in 1309901920000000

= 1316452870492112
