Fortunately, however, manufacturers are giving up the old box method and are learning to make smaller chips in the tree.
不过，幸运的是，制造商正在放弃旧的盒式方法，并正在学习在树上制造更小的碎片。
英语百科
Grid method multiplication
In mathematics education at the level of primary school or elementary school, the grid method (also known as the box method) of multiplication is an introductory approach to multi-digit multiplication calculations, i.e. multiplications involving numbers larger than ten.