A tractor can plow (3/4) hectares per hour. After plowing (4/5) hours, there is still (1/8) hectares left. How many hectares does this land have?
一台拖拉机耕地，每小时可以耕(3/4)公顷，耕了(4/5)小时，还剩(1/8)公顷，这块地有多少公顷？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(3/4) * (4/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(3/5) + (1/8)</gadget>
<output>29/40 = around 0.725</output>

<result>29/40 = around 0.725</result>