A canteen transports (5/4) tons of coal, burns (1/5) on the first day, and burns (1/5) tons on the second day, how many tons of coal are burned in two days?
某食堂运进(5/4)吨煤，第一天烧去(1/5)，第二天烧去(1/5)吨，两天共烧煤多少吨？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

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

<gadget id="calculator">(5/4) * (1/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<result>9/20 = around 0.45</result>