The school built a teaching building, originally planned to invest 5.6 million yuan, but the actual investment was saved (1/7) compared with the original plan. How much is the actual investment?
学校建教学楼，原计划投资560万元，实际投资比原计划节约了(1/7)．实际投资多少万元？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">56 * (6/7)</gadget>
<output>48</output>

<result>48</result>