Xiaoming has 83 books, and Xiaohua has 17 books. After Xiaoming gives Xiaohua more books, Xiaoming's books are three times that of Xiaohua's books. (solution by equation)
小明有书83本，小华有书17本，小明又给小华多少本书后，小明的书是小华的书的3倍．(用方程解)
<gadget id="calculator">17 * 3</gadget>
<output>51</output>

<gadget id="calculator">83 - 51</gadget>
<output>32</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<result>8</result>