Half of a basket of fish sold is 1.2 kilograms. At this time, the basket still has 15.2 kilograms. If (3/4) of this basket of fish is sold, the basket still has 9.1 kilograms. How many kilograms does this basket of fish have?
一筐鱼卖出一半多1.2千克，这时连筐还有15.2千克，若卖出这筐鱼的(3/4)，这时连筐还有9.1千克，这筐鱼原来有多少千克？
<gadget id="calculator">1.2 - 9.1</gadget>
<output>-7.9</output>

<gadget id="calculator">15.2 + (-7.9)</gadget>
<output>7.3</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">7.3 / (1/4)</gadget>
<output>29.2</output>

<result>29.2</result>