Alright, let's work through 47407297 times 78121973 step by step
47407297 × 78121973 = 78121973 × (47407297)
+ 78121973 × 7 that equals 546853811
+ 78121973 × 90 resulting in 7030977570
+ 78121973 × 200 that is equal 15624394600
+ 78121973 × 7000 resulting in 546853811000
+ 78121973 × 00000 yielding 0
+ 78121973 × 400000 what gives us 31248789200000
+ 78121973 × 7000000 yielding 546853811000000
+ 78121973 × 40000000 producing 3124878920000000

= 3703551576236981
