On the National Day, the students made colorful flowers to decorate the classroom. They made 30 yellow flowers. The blue flowers were three times as many as the yellow flowers. The red flowers were 20 more than the total number of blue flowers and yellow flowers. How many red flowers did the students make?
国庆节同学们做彩花装扮教室，做了30朵黄花，蓝花是黄花的3倍，红花比蓝花和黄花的总数多20朵，同学们做了多少朵红花？
<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">90 + 30</gadget>
<output>120</output>

<gadget id="calculator">120 + 20</gadget>
<output>140</output>

<result>140</result>