Alright, let's work through 63425745 times 78654622 step by step
63425745 × 78654622 = 78654622 × (63425745)
+ 78654622 × 5 that results in 393273110
+ 78654622 × 40 that is equal 3146184880
+ 78654622 × 700 giving us 55058235400
+ 78654622 × 5000 that results in 393273110000
+ 78654622 × 20000 giving us 1573092440000
+ 78654622 × 400000 that equals 31461848800000
+ 78654622 × 3000000 resulting in 235963866000000
+ 78654622 × 60000000 giving us 4719277320000000

= 4988727998043390
