A two-digit number is equal to six times the sum of its digits. Find the two-digit number.
一个两位数等于它的数字和的6倍，求这个两位数．
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">50 + 4</gadget>
<output>54</output>

<result>54</result>