A kind of pesticide is mixed with water at a ratio of 1:100. If 202 kg of this pesticide is prepared, how many kg of water is needed?
一种农药，药和水按1：100配成，配成这种农药202千克，需水多少千克．
<gadget id="calculator">1 + 100</gadget>
<output>101</output>

<gadget id="calculator">100 / 101</gadget>
<output>100/101 = around 0.990099</output>

<gadget id="calculator">202 * (100/101)</gadget>
<output>200</output>

<result>200</result>