In a division formula, the divisor is 18, the quotient is 21, and the remainder is 5. What is the dividend?
一道除法算式，除数是18，商是21，余数是5，则被除数是多少．
<gadget id="calculator">21 * 18</gadget>
<output>378</output>

<gadget id="calculator">378 + 5</gadget>
<output>383</output>

<result>383</result>