The budget for completing a project is 800,000 yuan, which was increased (1/10) due to needs, and the actual cost was reduced (2/5) due to technological innovation during construction. How much did this project actually cost?
完成一项工程预算为80万元，后因需要增加了预算的(1/10)，在施工中由于技术革新，实际费用降低了(2/5)．这项工程实际用了多少万元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">80 * (11/10) * (3/5)</gadget>
<output>264/5 = around 52.8</output>

<result>264/5 = around 52.8</result>