Alright, let's work through 72124704 times 78856196 step by step
72124704 × 78856196 = 78856196 × (72124704)
+ 78856196 × 4 that results in 315424784
+ 78856196 × 00 that results in 0
+ 78856196 × 700 that is equal 55199337200
+ 78856196 × 4000 that equals 315424784000
+ 78856196 × 20000 that results in 1577123920000
+ 78856196 × 100000 that equals 7885619600000
+ 78856196 × 2000000 giving us 157712392000000
+ 78856196 × 70000000 that results in 5519933720000000

= 5687479795065984
