Alright, let's work through 71203879 times 5316349 step by step
71203879 × 5316349 = 5316349 × (71203879)
+ 5316349 × 9 yielding 47847141
+ 5316349 × 70 giving us 372144430
+ 5316349 × 800 what gives us 4253079200
+ 5316349 × 3000 that equals 15949047000
+ 5316349 × 00000 giving us 0
+ 5316349 × 200000 resulting in 1063269800000
+ 5316349 × 1000000 producing 5316349000000
+ 5316349 × 70000000 producing 372144430000000

= 378544670917771
