When a number is divided by 5, the quotient is 28 and the remainder is 4. What is the number?
一个数除以5，商是28，余数是4，这个数是多少．
<gadget id="calculator">28 * 5</gadget>
<output>140</output>

<gadget id="calculator">140 + 4</gadget>
<output>144</output>

<result>144</result>