There are 450 red flowers in the garden, and the number of yellow flowers is 70 less than three times that of red flowers. How many yellow flowers are there?
花园里有红花450朵，黄花的朵数是红花的3倍少70朵，黄花有多少朵？
<gadget id="calculator">450 * 3</gadget>
<output>1_350</output>

<gadget id="calculator">1_350 - 70</gadget>
<output>1_280</output>

<result>1_280</result>