When a number is divided by 9, the quotient and remainder are both 6, what is the dividend?
一个数除以9，商和余数都是6，被除数是多少．
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">54 + 6</gadget>
<output>60</output>

<result>60</result>