The dividend is equal to the divisor by removing the trailing 0. The difference between the dividend and the divisor is 243. What is the divisor?
被除数去掉末尾的0就与除数相等，被除数与除数相差243，除数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">243 / 9</gadget>
<output>27</output>

<result>27</result>