The quotient of a number divided by 9 is 5 and the remainder is 2. What is the number?
一个数除以9商是5，余数是2，这个数是多少．
<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">45 + 2</gadget>
<output>47</output>

<result>47</result>