Chaoyang Primary School organized donation activities for the disaster area. The donation amount of the fourth grade accounted for 20% of the whole school, and the donation amount of the fifth grade accounted for (1/4) of the whole school. The fifth grade donated 120 yuan more than the fourth grade. How much did the school donate in total?
朝阳小学组织为灾区捐款活动，四年级的捐款数额占全校的20%，五年级的捐款数额占全校的(1/4)，五年级比四年级多捐120元．全校共捐款多少元？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">120 / (1/20)</gadget>
<output>2_400</output>

<result>2_400</result>