An empty bucket can be filled with 5 bowls of water or 8 cups of water, now pour 2 bowls of water and 2 cups of water into the empty bucket, how much will the water level rise to the height of the empty bucket.
空桶可以装满5碗水或8杯水，现将2碗水和2杯水倒入空桶，水面上升到空桶高度的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(1/8) * 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) + (1/4)</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>