There is a highway with a length of 3200 meters. The engineering team repaired it (1/4) on the first day and (1/5) on the second day. How many meters should the repair start on the third day?
有一条公路长3200米，工程队第一天修了它的(1/4)，第二天修了它的(1/5)，第三天应该从多少米处开始修．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3_200 * (1/4)</gadget>
<output>800</output>

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

<gadget id="calculator">3_200 * (1/5)</gadget>
<output>640</output>

<gadget id="calculator">800 + 640</gadget>
<output>1_440</output>

<result>1_440</result>