foreignPrice = getChainlinkPrice(address(foreignAsset));
foreignPrice = 1e8
totalUSD = foreignPrice;
totalUSD = 1e8;
totalUSDV = pairData
    .nativeTokenPriceAverage
    .mul(pairData.foreignUnit)
    .decode144()
// pairData.nativeTokenPriceAverage == 2**112
// pairData.foreignUnit = 10**18
// decode144(x) = x >> 112
totalUSDV = (2**112).mul(10**18).decode144()
totalUSDV = 10**18
returnValue = (totalUSD * 1 ether) / totalUSDV;

returnValue = 1e8 * 1e18 / 1e18

returnValue = 1e8
