Cocos2d-js V3 onRequestProductResult callback error

[cocosfan]

This is my code (i have found pluginx for cocos2d-js)

onRequestProductResult: function (ret, productInfo) {

    cc.log(ret);

    cc.log(productInfo);

    var msgStr = "";

    if (ret == plugin.ProtocolIAP.RequestProductCode.RequestFail) {

        msgStr = "request error";

        cc.log(msgStr);

    } else if (ret == plugin.ProtocolIAP.RequestProductCode.RequestSuccess) {

        console.log("Product Request Success");

        this.product = productInfo

        cc.log(productInfo);

    }

}

Console log is 449229635.775578 for productInfo … This is meaningless
I dont understan which i did wrong

How can i fix it?