The construction site transported 27 tons of cement and 145 tons of yellow sand, and the amount of stones transported was 68 tons less than the total amount of cement and yellow sand. How many tons of stones are transported?
建筑工地运到水泥27吨，运到黄沙145吨，运到的石子比水泥、黄沙的总数少68吨．运到石子多少吨？
<gadget id="calculator">27 + 145</gadget>
<output>172</output>

<gadget id="calculator">172 - 68</gadget>
<output>104</output>

<result>104</result>