Alright, let's work through 51135335 times 27131053 step by step
51135335 × 27131053 = 27131053 × (51135335)
+ 27131053 × 5 resulting in 135655265
+ 27131053 × 30 giving us 813931590
+ 27131053 × 300 that results in 8139315900
+ 27131053 × 5000 that equals 135655265000
+ 27131053 × 30000 that equals 813931590000
+ 27131053 × 100000 yielding 2713105300000
+ 27131053 × 1000000 giving us 27131053000000
+ 27131053 × 50000000 which equals 1356552650000000

= 1387355484057755
