0.38*7-(19/50)+4*(19/50).
0.38*7-(19/50)+4*(19/50)．
<gadget id="calculator">0.38 * 7</gadget>
<output>2.66</output>

<gadget id="calculator">19 / 50</gadget>
<output>19/50 = around 0.38</output>

<gadget id="calculator">2.66 - (19/50)</gadget>
<output>2.28</output>

<gadget id="calculator">4 * (19/50)</gadget>
<output>38/25 = around 1.52</output>

<gadget id="calculator">2.28 + (38/25)</gadget>
<output>3.8</output>

<result>3.8</result>