To prepare a pesticide, the ratio of liquid medicine to water is 1:50, and 1020 grams of pesticide is prepared, how many grams of liquid medicine is needed?
配制一种农药，药液和水的比是1：50，配制农药1020克，需要药液多少克？
<gadget id="calculator">1 + 50</gadget>
<output>51</output>

<gadget id="calculator">1 / 51</gadget>
<output>1/51 = around 0.019608</output>

<gadget id="calculator">1_020 * (1/51)</gadget>
<output>20</output>

<result>20</result>