No problem, we've got 80518405 and 8295767 to multiply
80518405 × 8295767 = 8295767 × (80518405)
+ 8295767 × 5 producing 41478835
+ 8295767 × 00 that results in 0
+ 8295767 × 400 resulting in 3318306800
+ 8295767 × 8000 that equals 66366136000
+ 8295767 × 10000 which equals 82957670000
+ 8295767 × 500000 that is equal 4147883500000
+ 8295767 × 0000000 resulting in 0
+ 8295767 × 80000000 resulting in 663661360000000

= 667961927091635
