Answer = 334,740 Two methods of working this out: # Put 3985 into your calculator, press the x button then put in 84 and press = # Do a long multiplication (had on a computer screen!), but basically you break the sum down to (3,985 x 80) + (3,985 x 4) = (3,985 x 8 x 10) + (3,985 x 4). You can actually break this down further if you still find these sums difficult (3,000 x 8 + 900 x 8 + 80 x 8 + 5 x 8) x 10 + 3,000 x 4 + 900 x 4 + 80 x 4 + 5 x 4 = (24,000 + 7,200 + 640 + 40) x 10 + 12,000 + 3,600 + 320 + 20 = 318,800 + 15,940 = 334,740
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