A, B, and C plant trees. The number of trees of species A is (1/2) that of B and C, and the number of trees of species B is (1/3) of that of A and C. It is known that C has planted 260 trees. How many trees did A, B, and C plant in total?
甲、乙、丙三人植树，甲种的棵数是乙丙和的(1/2)，乙种的棵数是甲丙和的(1/3)，已知丙种了260棵．甲、乙、丙三人共种树多少棵？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 260</gadget>
<output>260/3 = around 86.666667</output>

<gadget id="calculator">260 + (260/3)</gadget>
<output>1_040/3 = around 346.666667</output>

<gadget id="calculator">2 - (1/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(1_040/3) / (5/3)</gadget>
<output>208</output>

<gadget id="calculator">2 * 208</gadget>
<output>416</output>

<gadget id="calculator">416 - 260</gadget>
<output>156</output>

<gadget id="calculator">208 + 156 + 260</gadget>
<output>624</output>

<result>624</result>