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Math problem 30 times 16 equals 1904.
34*56= 1904, method 1, 1904 divided by 30 equals 63, 1904 divided by 40 equals 47+24, so several hexagons are between 47 and 63, so only 56, 1904 divided by 56 equals 34. Method 2: Only the mantissa of 4 multiplied by 9 and 6 is 4, so 30 may be 34 and 39, 1904 divided by 34 equals 56, and 1904 divided by 39 is not divisible.