In the botanical garden, the pot ratio of chrysanthemums to roses is 3:4, the ratio of orchids to tulips is 5:6, and the ratio of chrysanthemums to tulips is 4:5. If there are more than 50 pots of roses than orchids, how many pots of chrysanthemums are less than tulips?
植物园里菊花与月季花的盆数之比是3：4，兰花与郁金香的盆数之比是5：6，菊花与郁金香的盆数之比是4：5．如果月季比兰花多50多盆，那么菊花比郁金香少多少盆？
<gadget id="calculator">30 * 56</gadget>
<output>1_680</output>

<gadget id="calculator">1_680 / 7</gadget>
<output>240</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 240</gadget>
<output>192</output>

<gadget id="calculator">240 - 192</gadget>
<output>48</output>

<result>48</result>