Yangxi shopping mall bought 34 boxes of children's toothpaste, 25 boxes per box, and each box sold for 4 yuan. How much can these children's toothpaste be sold in total?
阳西商场购进34箱儿童牙膏，每箱25盒，每盒卖4元．这些儿童牙膏一共可卖多少元？
<gadget id="calculator">34 * 25</gadget>
<output>850</output>

<gadget id="calculator">4 * 850</gadget>
<output>3_400</output>

<result>3_400</result>