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Multiplying: 3 digit numbers with hints [1]

Multiplying: 3 digit numbers with hints [1]

 
 
774
337 ×
7 × 4 = 28
7 × 70 = 490
7 × 700 = 4900
30 × 4 = 120
30 × 70 = 2100
30 × 700 = 21000
300 × 4 =
1200
300 × 70 =
21000
300 × 700 =
+ 210000
260838