This is the 5209th most frequent Chinese word.
七百
Seven hundred.
In this sentence, "七百" means seven hundred units of currency, specifically yuan, serving as a numerical value representing an approximate cost.
这个店的商品价格大约是七百元。
The goods in this store are priced around seven hundred yuan.
Here, "七百" indicates a position in an ordinal series, expressing the sequence number of an item among others, namely the seven hundredth.
这是第七百本我读过的书。
This is the seven hundredth book I have read.
In this example, "七百" quantifies the number of students, demonstrating its use as a cardinal number to count objects or individuals.