The mass ratio of peaches, apples, and bananas is 2:3:4. It is known that the total weight of apples is 105 kilograms. How many kilograms are peaches?
桃、苹果、香蕉的质量比是2：3：4，已知苹果共重105千克，桃有多少千克？
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">105 / (1/3)</gadget>
<output>315</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">315 * (4/9)</gadget>
<output>140</output>

<result>140</result>