An orange in a fruit shop weighs six times that of a pear and twice that of an apple. It is known that there are 4 baskets of pears, and each basket weighs 50 kilograms. How many kilograms are there apples?
水果店里橘子的重量是梨的6倍，是苹果的2倍．已知梨有4筐，每筐重50千克，苹果有多少千克．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">50 * 4 * 3</gadget>
<output>600</output>

<result>600</result>