Alright, let's work through 87464097 times 80307053 step by step
87464097 × 80307053 = 80307053 × (87464097)
+ 80307053 × 7 what gives us 562149371
+ 80307053 × 90 which equals 7227634770
+ 80307053 × 000 resulting in 0
+ 80307053 × 4000 giving us 321228212000
+ 80307053 × 60000 which equals 4818423180000
+ 80307053 × 400000 what gives us 32122821200000
+ 80307053 × 7000000 that is equal 562149371000000
+ 80307053 × 80000000 what gives us 6424564240000000

= 7023983873376141
