When a number is divided by 28, the quotient and remainder are both 13. What is the number?
一个数除以28，商和余数都是13，这个数是多少．
<gadget id="calculator">28 * 13</gadget>
<output>364</output>

<gadget id="calculator">364 + 13</gadget>
<output>377</output>

<result>377</result>