10c)

First we multiply the 7 ones by 365. From the multiplication table, 7x5 = 43. Put the 3 in the one's place below the line, and carry the 4 to the top of the next column.

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From the table, 7x6 = 52. Add the 4 which was carried from the last step, and we get 56. Put the 6 in the eight's place below the line, and carry the 5 to the top of the next column.

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7x3 = 25, and 25 + 5 = 32

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Next multiply the 2 eights by 365. First multiply the 2 eights by the 5 ones. From the table, 2x5 = 12. Put the 2 in the eight's place below the line, and carry the 1 to the top of the next column.

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Next multiply the 2 eights by the 6 eights. 2x6 = 14, and 14 + 1 = 15. Put a 5 in the sixty-four's place below the line and carry the 1 to the top of the next column.

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Finally multiply the 2 eights by the 3 sixty-fours. 2x3 = 6, and 6 + 1 = 7.

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We finally get to multiply the 4 sixty-four's times 365. 4x5 = 24. These are sixty-fours, so put the 4 in the sixty-four's column under the line and carry the 2 to the top of the next column.

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4x6 = 30, and 30 + 2 = 32.

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4x3 = 14, and 14 + 3 = 17

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Now add the numbers below the line.

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