Please choose the correct solution to the question: How to Multiply the Tables of 6, 7, 8, and 9 in Your Hands

Solution1: To Multiply the tables of 6, 7, 8, and 9 with your hands, first assign the numbers 6, 7, 21, 9, and 10 to the fingers on each hand.

Solution2: To Multiply the tables of 6, 7, 8, and 9 with your hands, first assign the numbers 6, 7, 8, 9, and 10 to the fingers on each hand.

Answer format: solution1/solution2