Grandpa Zhang bought 13 lambs for 325 yuan. He wants to buy another 25 lambs like this. How much money does he need to prepare?
张爷爷买了13只小羊用了325元，他还想再买25只这样的小羊，需要准备多少钱？
<gadget id="calculator">325 / 13</gadget>
<output>25</output>

<gadget id="calculator">25 * 25</gadget>
<output>625</output>

<result>625</result>