When a number is divided by 6, the quotient is 9 and the remainder is 4. What is the number?
一个数除以6，商是9，余数是4，这个数是多少．
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">54 + 4</gadget>
<output>58</output>

<result>58</result>