6 x 6 is 36 so put the 6 under the six's and put the 3 above the 3 in 8736.
6 x 3 is 18, plus the 3 you carried so it's 21. write down 1 next to the 6 in the sum area and carry the 2.
6 x 7 is 42 plus 2 equals 44. Write down 4 carry the 4.
6 x 8 is 48 plus 4 equals 52. Your final answer should be 52,416