The ratio of a pesticide to water is 1:1000. How many kilograms of pesticides are needed to prepare 15015 kilograms of this pesticide water?
一种农药与水的比是1：1000．要配制这种农药水15015千克，需要多少千克农药？
<gadget id="calculator">1 + 1_000</gadget>
<output>1_001</output>

<gadget id="calculator">1 / 1_001</gadget>
<output>1/1_001 = around 0.000999</output>

<gadget id="calculator">15_015 * (1/1_001)</gadget>
<output>15</output>

<result>15</result>