After mixing alcohol and water, the alcohol is 20 liters more than half of the total amount, and the water is 1 liter more than half the alcohol, find the total amount of alcohol and water.
酒精与水混合后，酒精比总量的一半多20升，水比酒精的一半多1升，求酒精与水的总量．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 * (1/2)</gadget>
<output>10</output>

<gadget id="calculator">20 + 10 + 1</gadget>
<output>31</output>

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

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

<gadget id="calculator">31 / (1/4)</gadget>
<output>124</output>

<result>124</result>