Let \( l_{1},l_{2},\ldots,l_{100} \) be consecutive terms of an arithmetic progression with common difference \( d_{1} \), and let \( w_{1},w_{2},\ldots,w_{100} \) be consecutive terms of another arithmetic progression with common difference \( d_{2} \), where \( d_{1}d_{2}=10 \). For each \( i=1,2,\ldots,100 \), let \( R_{i} \) be a rectangle with length \( l_{i} \), width \( w_{i} \) and area \( A_{i} \). If \( A_{51}-A_{50}=1000 \), then the value of \( A_{100}-A_{90} \) is ____________.
