The dividend and the divisor are multiplied by 5 at the same time, the resulting quotient is 10, and the remainder is 15. If the dividend is 183, what is the original divisor?
被除数和除数同时乘5，结果商是10，余数是15，如果被除数原是183，除数原数是多少？
<gadget id="calculator">15 / 5</gadget>
<output>3</output>

<gadget id="calculator">183 - 3</gadget>
<output>180</output>

<gadget id="calculator">180 / 10</gadget>
<output>18</output>

<result>18</result>