The calculator shows the result that enrique got after evaluating the expression 56 + 7 × (34 – 17) – 16 . he checked his work by rounding all of the values to the nearest ten and comparing it to the calculator result. which is true regarding his estimate and the accuracy of his calculator result?

the estimated result is 140, which suggests the calculator is correct.
the estimated result is 240, which suggests the calculator is incorrect.
the estimated result is 320, which suggests the calculator is incorrect.
the estimated result is 680, which suggests the calculator is incorrect.