The West District vegetable market brought in 120 baskets of tomatoes in the morning and 150 baskets in the afternoon. It is known that 900 kilograms more tomatoes were brought in in the afternoon than in the morning. How many kilograms of tomatoes were brought in in the afternoon?
西区菜市场运进每筐质量相等的西红柿，上午运进120筐，下午运进150筐，已知下午比上午多运进了900千克，下午运进多少千克西红柿？
<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<gadget id="calculator">900 / 30</gadget>
<output>30</output>

<gadget id="calculator">30 * 150</gadget>
<output>4_500</output>

<result>4_500</result>