Alright, let's work through 7929 times 4243 step by step
7929 × 4243 = 4243 × (7929)
+ 4243 × 9 yielding 38187
+ 4243 × 20 resulting in 84860
+ 4243 × 900 giving us 3818700
+ 4243 × 7000 that equals 29701000

= 33642747
