The post office remittance exchange rate is 1%. Guangming Primary School remitted money to the disaster area in Ya’an, and paid a total of 40 yuan. How much did Guangming Primary School donate to the disaster area?
邮局汇款的汇率是1%，光明小学给雅安灾区汇钱，一共付了40元的汇费，光明小学一共给灾区捐款多少元？
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">40 / (1/100)</gadget>
<output>4_000</output>

<result>4_000</result>