A new bag of rice in the cafeteria is used (1/8) on the first day, and 4 kg is used on the second day. If you share this bag of rice for two days (9/40), how much will you use this bag of rice for the next day?
食堂新进一袋大米，第一天用去(1/8)，第二天用去4千克．两天共用去这袋大米的(9/40)，第二天用去这袋大米的多少．
<gadget id="calculator">9 / 40</gadget>
<output>9/40 = around 0.225</output>

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

<gadget id="calculator">(9/40) - (1/8)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>