Red syrup is made of red mercury and distilled water at a ratio of 1:50. To prepare 153kg of red syrup, how many kilograms of red mercury are needed?
红药水是用红汞与蒸馏水按1：50配制而成的，要配制153kg的红药水，需要红汞多少千克？
<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">153 * (1/51)</gadget>
<output>3</output>

<result>3</result>