Compute 29292 × 9999 = ?
292890708
Use 9999 = 10000 – 1.
29292 × 9999
= 29292 × 10000 – 29292
= 292920000 – 29292
= 292890708
Check: the last digits 2 × 9 = 18 end in 8, matching 292890708.
Hence, 292890708.
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