The quotient of a number divided by 9 is 5, and the remainder is 8. What is the number?
一个数除以9商是5，余数是8，这个数是多少．
<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">45 + 8</gadget>
<output>53</output>

<result>53</result>