Take a measuring cup. Take a 100 ml measuring cup as an example. The density of soybean is different from that of water. When filled with soybeans, its weight is about 65-110g. The method of measuring soybean with a measuring cup is as follows:

1. Prepare an electronic scale for weighing soybeans and put the electronic scale on a stable horizontal surface.

2. Put a measuring cup on the electronic scale and pay attention to zero.

3. Gradually pour the soybeans into the measuring cup until the reading in the measuring cup reaches 20g. In the process of pouring soybeans, gently shake the measuring cup to let the soybeans fill the whole measuring cup to avoid gaps.

4. If the reading exceeds 20g, you can gently pour out some soybeans until the reading is exactly 20g.