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Mathematics on the problem of license plate
As long as the first three numbers are determined, the license plate can be determined. The last two numbers are symmetrical with the first two numbers, so there is no choice.

The first number can only be 8 and 9. There are two choices. The second and third places are 10* 10= 100. So the answer is 2* 100=200, choose C.

3.14 * 560 *120/180 is about = 1 172mm.