Use the following formula for the volume:
V = w*l*h
where,
w: width of the chip = 3.5*10^-7 m
l: length of the chip = 1.8*10^-8 m
h: height of the chip = 6.45*10^-5 m
Replace the previous values of the parameters into the formula for V and simplify (consider to multiply coeeficients and then exponential factors):
![\begin{gathered} V=(3.5\cdot10^(-7)m)(1.8\cdot10^(-8)m)(6.45\cdot10^(-5)m) \\ V=(3.5\cdot1.8\cdot6.45)(10^(-7)\cdot10^(-8)\cdot10^(-5)m^3) \\ V=40.635\cdot10^(-20)m^3 \\ V=4.0635\cdot10^(-19)m^3\approx4.1\cdot10^(-19)m^3 \end{gathered}](https://img.qammunity.org/2023/formulas/physics/college/6fr24tj1odx19nlafhrl7uij1qmvhov10r.png)
Hence, the volume of the chip is approximately 4.1*10^-19 m^3