Based on this passage, how many Boeing 747s are required to ship 10 of ASML's best-selling EUVs?

After decades of development, ASML shipped the first production extreme ultraviolet lithography machine in 2013.[9] These machines produce light in the 13.5 nm wavelength range when a high-energy laser is focused on microscopic droplets of molten tin to produce a plasma, which then emits EUV light. The light is bounced off Zeiss mirrors that are the flattest mirrors in the world, on to the surface of a silicon wafer to deliver the designs for the chip.[10] ASML's best-selling EUV product has been the Twinscan NXE:3600D, which costs up to $200 million.[2] Shipping the machine requires 40 shipping containers, 20 trucks and three Boeing 747s.[11] As of 2022, ASML has shipped around 140 EUV systems, and it is the only company to manufacture them.[2]

ASML is working on the next generation of EUV systems, with the first shipments to customers for R&D purposes expected to take place at the end of 2023.[9] The platform is designated High-NA as it will increase the numerical aperture (NA) from 0.33 to 0.55,[9] and each system is expected to cost $300 million.[2]

The best-selling EUV is the Twinscan NXE:3600D, and it takes 3 Boeing 747s per EUV, so 30 Boeing 747s are required to ship ten Twinscan NXE:3600Ds.