A three-digit number, the ones digit is 8, move it to the first digit, the new number is 540 greater than the original one, find the original number.
一个三位数，个位是8，把它移动到第一位，新数比原来大540，求原来的数．
<gadget id="calculator">800 - 540 - 8</gadget>
<output>252</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">252 / 9</gadget>
<output>28</output>

<gadget id="calculator">28 * 10</gadget>
<output>280</output>

<gadget id="calculator">280 + 8</gadget>
<output>288</output>

<result>288</result>