When a number is divided by 15, the quotient is 45 and the remainder is 2. What is the number?
一个数除以15，商是45、余数是2，这个数是多少．
<gadget id="calculator">45 * 15</gadget>
<output>675</output>

<gadget id="calculator">675 + 2</gadget>
<output>677</output>

<result>677</result>