The ratio of cucumbers to tomatoes is 5:9. Tomatoes are 180kg more than cucumbers. How many kilograms are cucumbers?
黄瓜与西红柿的比是5：9，西红柿比黄瓜多180千克，黄瓜有多少千克？
<gadget id="calculator">9 - 5</gadget>
<output>4</output>

<gadget id="calculator">180 / 4</gadget>
<output>45</output>

<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<result>225</result>