In a division formula, both the quotient and the divisor are 18, what is the dividend when the remainder is the largest.
在一道除法算式中，商和除数都是18，余数最大时，被除数是多少．
<gadget id="calculator">18 * 18</gadget>
<output>324</output>

<gadget id="calculator">18 - 1</gadget>
<output>17</output>

<gadget id="calculator">324 + 17</gadget>
<output>341</output>

<result>341</result>