car moving at the same speed, the milestone seen in the first hour is a two-digit milestone, the milestone seen in the second hour is a two-digit number after swapping the tens and ones digits, and the milestone seen in the third hour The middle number is 0, the hundreds digit is the original (first) tens digit, and the ones digit is the three digits of the original (first seen) letter digit, then the speed of this car how many.
一辆汽车用同一速度前进，第一小时看到的里程碑是一个两位数，第二小时看到的里程碑是交换十位数字和个位数字后的两位数，第三小时看到的里程碑是一个中间数字为0，百位数字是原来(第一次)的十位数字，个位数字是原来(第一次见到的)的信位数字的三位数，那么这辆汽车的速度是多少．
<gadget id="calculator">61 - 16</gadget>
<output>45</output>

<result>45</result>