Ding Ding used a 4.3-meter-long bamboo pole to measure the depth of a pond. The part of the bamboo pole that entered the mud was 0.3 meters, and the part above the water was 1.2 meters. How deep is this pond?
丁丁用一根长4.3米的竹竿测量一个水塘的深度，竹竿入泥的部分是0.3米，露出水面的部分是1.2米．这个水塘深多少米？
<gadget id="calculator">4.3 - 0.3 - 1.2</gadget>
<output>2.8</output>

<result>2.8</result>