There are three kinds of fruit trees in the orchard: peach tree, pear tree and apple tree. There are 70 peach trees, pear trees account for 1/4 of the total number of fruit trees, and the ratio of the number of apple trees to the other two trees is 1:3. How many fruit trees are there in the orchard?
果园里有桃树、梨树和苹果树三种果树．桃树有70棵，梨树占果树总棵树的(1/4)，苹果树的棵树与另外两种树棵数的比是1：3．果园里共有果树多少棵？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">70 / (1/2)</gadget>
<output>140</output>

<result>140</result>