Mr. Zhang took out the money he had saved for 5 years. It is known that the annual interest rate is 2.43%, and the interest is 97.2 yuan. How much money did he save at that time?
张老师将存了5年的钱取出来，已知年利率为2.43%，利息是97.2元，他当时存了多少钱？
<gadget id="calculator">2.43 / 100</gadget>
<output>0.0243</output>

<gadget id="calculator">97.2 / 0.0243 / 5</gadget>
<output>800</output>

<result>800</result>