Grandpa Wang, a professional pig farmer, bought 12 piglets for 900 yuan, and he wants to buy 8 more of the same piglets. How much money do he need to prepare?
养猪专业户王爷爷买12只小猪用去900元，他还想再买8只同样的小猪，还需要准备多少钱？
<gadget id="calculator">900 / 12</gadget>
<output>75</output>

<gadget id="calculator">75 * 8</gadget>
<output>600</output>

<result>600</result>