When rounding 4536 to the nearest thousand, you look at the hundreds place, which is 5 in this case. Since 5 is equal to or greater than 5, you round up the thousands place to the next higher number. Therefore, 4536 rounded to the nearest thousand is 5000.
4536 9*9*8*7=4536
9*9*8*7 = 4536
1000
1000
1000
It is then: 4500
4536 9*9*8*7=4536
9*9*8*7 = 4536
1000
1000
1000
4536 + 68377 = 72913
1000
1000
1000
1000
9 times 4536 = 40824