No problem, we've got 42124475 and 15925127 to multiply
42124475 × 15925127 = 15925127 × (42124475)
+ 15925127 × 5 what gives us 79625635
+ 15925127 × 70 that equals 1114758890
+ 15925127 × 400 producing 6370050800
+ 15925127 × 4000 yielding 63700508000
+ 15925127 × 20000 giving us 318502540000
+ 15925127 × 100000 that results in 1592512700000
+ 15925127 × 2000000 yielding 31850254000000
+ 15925127 × 40000000 that results in 637005080000000

= 670837614183325
