Use coal, sulfur, and water to prepare pesticides in a ratio of 2:3:15. Sulfur is used 480 grams less than water. How many pesticides have been prepared in total?
用石炭、硫磺和水按2：3：15的比配制农药，硫磺比水少用了480克，一共配制了多少农药？
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">480 / 12</gadget>
<output>40</output>

<gadget id="calculator">2 + 3 + 15</gadget>
<output>20</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<result>800</result>